Writing fluid dispensing apparatus



ec. 4, 1951 F. FERBER 2,577,572

WRITING FLUID DISPENSING APPARATUS I Filed Jan. 10, 1947 3 13 I I ll, Iy i. BL

.11 l l I 10 1 17 12 I NVENTOR. l ea erb er Patented Dec. 4, 1951 a PATENT OFFICE.

. FliedlFrlier, Highokus TownshimBergena County, NJ.v

Application January 10, 19 17} Serial -No'. 721. 388

1 Glaim:- (Cl. 222-334) This: invention is an improvement in. dispensingapparatus, particularlyi apparatusr for. dispensing writing fluid .for reservoire. pens.

An important object of this invention is to provide -adispensing apparatus having means for supplying anadmeasured quantity of writing fluid to a reservoir pen of the ball-point type. The ink employed in such pens is generally thick and viscous and needs to be forced out of the receptacle to ensure the filling of the pen. The apparatus is designed to serve this purpose.

The drawings illustrate one form of the invention but variations in structure may be adopted without omitting any of essential parts of the invention or changing the character thereof.

Figure 1 is a vertical section on the line 22 of Figure 2;

Figure 2 is a front elevation of apparatus according to this invention;

Figure 3 is a horizontal section on line 33 of Figure 1; and

Figure 4 is a vertical section, at right angles to the place of section of Figure 1, showing the means for measuring the quantity of ink delivered at each operation of the apparatus.

The numeral I indicates a receptacle containing writing fluid of the required viscosity, to be discharged at the bottom into the delivery tube 2. The fluid is expelled by a power piston 3 in a cylinder 4, and to the piston 3 is afiixed a rod 5 that extends downward and projects out of the cylinder 4 into a vertical casing 6 in front of the container l. A controlling valve 'I mounted in the lower end of the rod 5, and in the casing 6 is a recess or chamber 8, surrounding the rod near the inner or lower extremity, and in position to receive fluid from a pipe 9, connecting the casing 6 and the receptacle I. The lower end of the casing 6 below the rod 5 has an outlet passage with a threaded port I l at the side of the casing 6 to receive a valve unit l2, to which the delivery tube 2 is attached.

The inner or lower end of the rod in the casing 6 has a transverse duct 13 through it from side to side in the chamber 8, and this rod has a recess l4 in said end which is substantially filled by the valve 1. The recess has communication at its inner end with the duct [3, and terminates in a shoulder l5, which the valve 1 engages to out 01f the fluid coming from the receptacle; and thus control the passage from the chamber 8 to the recess l4. The valve 1 has the form of a plug with one end coned to abut the shoulder l5. From this shoulder down to the open end of this recess or cavity l4, lead ducts IS in the sides of z theccavity M. The valve is retained in the ca-vity by. a cross-pin I l in the 7 rod: 5- spanning the recesssl4-atthewpen: end of the latter. On the upstroke" of' thepiston 3 the-valve opens, and ink flows: past' the; valve 1 by way of the ducts it into the-outlet duct 'lfl; and on the downstroke of the rod 5, the valve closes and the lower end of the rod 5 acts as a plunger to force the ink into the tube 2.

The top of the casing 6 has a recess l8 extending down into it from the bottom of the cylinder 4, and terminating in a shoulder 19. This recess is concentric with the bore in the casing which receives the rod 5, and it contains a spiral spring 20 that seals on the shoulder l9,.and engages the piston 3; tending to push the piston up. The piston comprises a lower disk 2i having a central hollow boss encircling the rod 5, and affixed thereto in any suitable manner, and an upper disk 22 also encircling the top of the rod 5. Between the two disks is a cupped washer 23, convex on its upper face. A nut on the end of the rod 5 in the cylinder 4 bends the disks 2| and 22 against the Washer 23 and secures the latter between them.

The cylinder 4 has a top or upper end 25 secured thereon,. and screwed into this head is a gland or bearing 26 having an internally threaded bore for connection with a pipe 21 leading to a reservoir of compressed air or other power medium. The numeral 28 indicates part of the sup porting frame of the apparatus and 29 are two posts that mount the reservoir I thereon. The casing 6 has at its lower end a threaded boss 3% which passes through an aperture in the frame 28, and engages a nut 3| to attach the casing t and the cylinder 4 rigidly in position.

In action the handle 32 of the valve or cock I2 is turned to open the outlet H! to the tube 2. Usually the spring 20 pushes the piston 3 up lifting the rod, and allowing the valve 7 to drop on the pin IT. The ink flows down through the grooves l6 into the outlet I0. When air is admitted over the piston 3 the rod is pushed down to close the valve 1 and some of the ink is forced past the cock [2 into the tube 2, which is of relatively small size. The latter delivers to the part of the pen (not shown) having the reservoir to fill the latter. The air is then allowed to escape from the cylinder by the operation of an exhaust valve not shown, the piston is then lifted by the spring 20, and more fluid passes into the outlet duct H] to be expelled through the tube 2 on the next downstroke of the piston 3.

The gland 26 projects into the cylinder and 3 limits the upward movement of the piston 4. Thus the quantity of ink delivered on each downstroke is regulated.

The apparatus is therefore quite simple and inexpensive, but eflicient and durable, and attains all the ends of the invention.

A spring 32 encircles the washer 22 beneath a shoulder 33 thereon, to hold the washer 23 against the inside of the cylinder 4.

Having described my invention, what I believe to be new is:

Dispensing apparatus comprising a receptacle, a casing adjacent said receptacle, a pipe connecting the casing to the receptacle, a plunger in the casing, the latter having a chamber surrounding the plunger and communicating with the pipe, the plunger having a cavity in one end and a passage connecting the cavity to the chamber, the casing having an outlet, a delivery tube connected to the outlet adjacent one end beyond the plunger, a valve in said cavity to control said passage, the cavity having an annular shoulder at its inner end and longitudinal grooves extending from said shoulder to the open end of the cavity,

said valve being cone-shaped at its inner end to 2 engage the shoulder, a transverse pin in the plunger to retain the valve in the cavity, the valve being movable between the shoulder and the pin, a power cylinder connected to the opposite end of the casing, a piston therein attached to the opposite end of the plunger, the casing having a shouldered recess in the end adjacent the cylinder, 9. spring in the recess engaging the piston, and a hollow gland in the cylinder for connection to a power medium, said gland being adjustable to limit the stroke of the piston.

FRED FERBER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,369,517 Boe Feb. 22, 1921 1,939,943 Barks Dec. 19, 1933 2,364,511 Bossi Dec. 5, 1944 2,461,332 Leonard Feb. 8, 1949 FOREIGN PATENTS Number Country Date 793,941 France Dec. 2, 1935 

